fix: add custom assertion methods to sonar-project.properties

Author: noraeb

sonar-project.properties

@@ -5,3 +5,4 @@ sonar.tests=packages/compas-open-scd/test
 sonar.javascript.lcov.reportPaths=packages/compas-open-scd/coverage/lcov.info
 sonar.exclusions=**/*.test.snap.js
 sonar.cpd.exclusions=**/translations/en.ts,**/translations/de.ts
+sonar.javascript.S2699.customAssertionMethods=called,calledOnce,calledTwice,calledThrice,calledWith,calledWithExactly,notCalled,null,equal,length